1. (informal) an adult whose interests and behaviour follow youth culture; someone who hasn't fully grown up

Derived forms: adultescents

• segue
• seguidilla
• Segway
• Segway HT
• Segway Human Transporter
• sei whale
• seicento
• seiche
• seidel
• Seidlitz powder
• Seidlitz powders
• seif dune
• seigneur
• Seigneur de Bayard
• seigneurial
• seigneury
• seignior
• seigniorage
• seigniorial
• seigniory
• Seiji Ozawa
• seine
• Seine River
• seiner
• seism